Consolidated Statements of Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Income before income taxes	$ 82,748	$ 82,197	$ 164,077	$ 152,401
Interest income
Interest and fees on loans	179,759	133,988	350,685	263,613
Interest Income, Securities, Operating, Taxable	15,581	11,281	30,890	21,324
Nontaxable interest and dividends on securities	2	2	3	3
Interest on loans held for sale	39	35	73	99
Interest on federal funds sold and short-term investments	3,312	2,817	3,977	3,703
Total interest and dividend income	198,693	148,123	385,628	288,742
Interest expense
Interest on deposits	31,909	2,111	54,584	4,218
Interest on borrowings	14,238	1,151	19,500	2,231
Total interest expense	46,147	3,262	74,084	6,449
Net interest income	152,546	144,861	311,544	282,293
Provision for (release of) credit losses	5,000	0	12,250	(2,000)
Net interest income after provision for credit losses	147,546	144,861	299,294	284,293
Noninterest income
Deposit account fees	5,508	5,828	11,424	11,321
Interchange and ATM fees	4,478	4,027	8,662	7,636
Investment Banking, Advisory, Brokerage, and Underwriting Fees and Commissions	10,348	9,329	20,127	18,002
Mortgage banking income	670	1,042	978	2,404
Bank Owned Life Insurance Income	1,940	1,871	3,794	3,666
Gain Realized on Life Insurance Policies	(176)	(123)	(187)	(123)
Loan level derivative income	1,275	436	1,683	1,040
Other noninterest income	6,362	5,242	12,144	9,978
Total noninterest income	30,757	27,898	58,999	54,170
Noninterest expenses
Salaries and employee benefits	53,975	49,538	110,950	98,249
Occupancy and equipment expenses	12,385	11,637	25,207	24,939
Data processing & facilities management	2,530	2,247	5,057	4,619
Business Combination, Acquisition Related Costs	0	0	0	7,100
Software Maintenance	3,134	2,645	6,083	5,209
Amortization of Intangible Assets	1,716	1,902	3,531	3,903
FDIC assessment	2,674	1,743	5,284	3,548
Debit card expense	2,217	1,861	4,388	3,626
Professional Fees	1,935	2,760	4,012	4,510
Other noninterest expenses	14,989	16,229	29,704	30,359
Total noninterest expenses	95,555	90,562	194,216	186,062
Income before income taxes	82,748	82,197	164,077	152,401
Current Federal, State and Local, Tax Expense (Benefit)	20,104	20,421	40,186	37,528
Net income	$ 62,644	$ 61,776	$ 123,891	$ 114,873
Basic earnings per share (in dollars per share)	$ 1.42	$ 1.32	$ 2.78	$ 2.44
Diluted earnings per share (in dollars per share)	$ 1.42	$ 1.32	$ 2.78	$ 2.44
Weighted average common shares (basic) (in shares)	44,129,152	46,665,101	44,564,209	47,013,989
Common shares equivalents (in shares)	7,573	14,096	13,568	17,403
Weighted average common shares (diluted) (in shares)	44,136,725	46,679,197	44,577,777	47,031,392
Retained Earnings [Member]
Noninterest expenses
Net income	$ 62,644	$ 61,776	$ 123,891	$ 114,873
Cash dividends declared per common share (in dollars per share)	$ 0.55	$ 0.51	$ 1.10	$ 1.02